EP2431772A1 - Optical product and eyeglass plastic lens - Google Patents
Optical product and eyeglass plastic lens Download PDFInfo
- Publication number
- EP2431772A1 EP2431772A1 EP10789423A EP10789423A EP2431772A1 EP 2431772 A1 EP2431772 A1 EP 2431772A1 EP 10789423 A EP10789423 A EP 10789423A EP 10789423 A EP10789423 A EP 10789423A EP 2431772 A1 EP2431772 A1 EP 2431772A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- optical
- optical product
- antifouling
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 118
- 239000004033 plastic Substances 0.000 title claims abstract description 16
- 229920003023 plastic Polymers 0.000 title claims abstract description 16
- 230000003373 anti-fouling effect Effects 0.000 claims abstract description 65
- 238000005421 electrostatic potential Methods 0.000 claims abstract description 22
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 14
- -1 silane compound Chemical class 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229910000077 silane Inorganic materials 0.000 claims description 10
- 239000010419 fine particle Substances 0.000 claims description 8
- 239000010702 perfluoropolyether Substances 0.000 claims description 8
- 125000005375 organosiloxane group Chemical group 0.000 claims description 6
- 239000000428 dust Substances 0.000 abstract description 22
- 230000005611 electricity Effects 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 41
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 28
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 24
- 239000000243 solution Substances 0.000 description 19
- 239000004794 expanded polystyrene Substances 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 210000002268 wool Anatomy 0.000 description 14
- 238000000151 deposition Methods 0.000 description 12
- 238000004040 coloring Methods 0.000 description 11
- 230000008021 deposition Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 229910003087 TiOx Inorganic materials 0.000 description 8
- 239000011324 bead Substances 0.000 description 8
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910001882 dioxygen Inorganic materials 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 6
- 229910001887 tin oxide Inorganic materials 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 150000003553 thiiranes Chemical class 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 229920005749 polyurethane resin Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229910001930 tungsten oxide Inorganic materials 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 229920006295 polythiol Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 150000004756 silanes Chemical class 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- DFUYAWQUODQGFF-UHFFFAOYSA-N 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane Chemical compound CCOC(F)(F)C(F)(F)C(F)(F)C(F)(F)F DFUYAWQUODQGFF-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000636 Ce alloy Inorganic materials 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910009815 Ti3O5 Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- OTARVPUIYXHRRB-UHFFFAOYSA-N diethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](C)(OCC)CCCOCC1CO1 OTARVPUIYXHRRB-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007786 electrostatic charging Methods 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
- G02B1/116—Multilayers including electrically conducting layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the present invention relates to an optical product such as a camera lens, and to a spectacle plastic lens.
- Optical products made of plastic are likely to adhere grime such as dirt or dust due to static electricity, and a spectacle lens in particular must be wiped frequently. If the lens is wiped or the like with dust thereon, the dust may scratch the lens surface. In other optical products as well, dust adhered thereto may affect output image and the like.
- Patent Document 1 a hard coat layer formed on a base contains conductive tin oxide.
- Patent Document 2 mentions an antireflection film including a transparent conductive film (an indium tin oxide film or an ITO film) formed by adding 5 to 10 weight percent (wt%) of tin oxide to indium oxide.
- the surface potential remains at zero even when the optical product is wiped or the like.
- the optical product is less likely to attract dust compared to an optical product that does not have such a coating layer and is thus electrostatically charged.
- electrostatically charged dust may be adhered to the optical product due to the potential difference between the surface potential and the electrostatically charged dust.
- the coating layer does not work for dust that has already been adhered to the optical product, and the coating layer does not facilitate the removal of such adhered dust.
- the invention according to claim 1 is related to an optical product characterized in that an antifouling film is formed on a base of the optical product to satisfy the following conditions: (1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and (2) a surface peel strength is 0.10 N/19 mm or less.
- the invention according to claim 2 is characterized in that , in the above invention, a hard coat film and an optical multilayer film are sequentially formed on the base of the optical product, and the antifouling film is formed on the optical multilayer film.
- the invention according to claim 3 is characterized in that , in the above invention, a conductive film is placed between the base of the optical product and the antifouling film.
- the invention according to claim 4 is characterized in that , in the above invention, the antifouling film is formed by performing coating with a silane compound having a perfluoropolyether group, wherein a coating film when made only of the silane compound has a peel strength of 0.10 N/19 mm or less.
- the invention according to claim 5 is characterized in that , in the above invention, the optical multilayer film is a multilayer film of an inorganic oxide.
- the invention according to claim 6 is characterized in that , in the above invention, the hard coat film contains an organosiloxane resin and inorganic oxide fine particles.
- the invention according to claim 7 is related to a spectacle plastic lens characterized in that , in the above invention, the base of the optical product is a base of the spectacle plastic lens, and the optical multilayer film is an antireflection film.
- an optical product having a high antifouling performance can be provided by introducing an antifouling film that satisfies the following conditions: (1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and (2) a surface peel strength is 0.10 N/19 mm or less.
- An optical lens as an example of an optical product of the present invention has a hard coat film, an optical multilayer film, and an antifouling film on a front surface of a lens base, in that order from the lens base.
- the film configuration may be modified.
- a primer layer may be formed between the front surface of the lens base and the hard coat film, or an intermediate layer may be provided between the front surface of the lens base and the hard coat film, between the hard coat layer and the optical multilayer film, between the optical multilayer film and the antifouling film.
- the hard coat film, the optical multilayer film, and the like may be formed on a back surface of the lens base or on both the front and back surfaces of the lens base.
- Examples of a material (a base material) of the lens base include a polyurethane resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyethersulfone resin, a poly-4-methylpentene-1 resin, and a diethylene glycol bisallyl carbonate resin.
- a preferred example of the material of the lens base having a high refractive index is a polyurethane resin that is obtained by addition-polymerizing a polyisocyanate compound and a polythiol and/or a sulfur-containing polyol.
- Another preferred example of the material of the lens base having a higher refractive index is an episulfide resin that is obtained by addition-polymerizing an episulfide group and a polythiol and/or a sulfur-containing polyol.
- the hard coat film is formed by uniformly coating the lens base with a hard coat solution.
- a hard coat solution for example, an organosiloxane resin containing inorganic oxide fine particles is used as a material of the hard coat film, and in this case, the hard coat solution is prepared by dispersing (mixing) mainly an organosiloxane resin and an inorganic oxide fine particle sol in water or an alcohol solvent.
- a preferred example of the organosiloxane resin is one obtained by hydrolyzing and condensing an alkoxysilane.
- the alkoxysilane include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, methyltrimethoxysilane, and ethyl silicate. Hydrolyzed condensations of these alkoxysilanes are produced by hydrolyzing the alkoxysilane compounds or combinations thereof using an acidic aqueous solution such as hydrochloric acid.
- the inorganic oxide fine particles include one of sols of zinc oxide, silicon dioxide, aluminum oxide, titanium oxide, zirconium oxide, tin oxide, beryllium oxide, antimony oxide, tungsten oxide, and cerium oxide, or alloys of two or more of the sols.
- the particle size of the inorganic oxide fine particles is preferably 1 to 100 nanometers (nm), and more preferably 1 to 50 nm.
- the amount of inorganic oxide fine particles is preferably 40 to 60 wt% based on the hard coat components in order to ensure appropriate levels of hardness and toughness of the hard coat film.
- an acetylacetone metal salt, an ethylenediaminetetraacetic acid metal salt, or the like may be added as a curing catalyst to the hard coat solution, and a surfactant, a colorant, a solvent, or the like may be further added as necessary for adjustment.
- the thickness of the hard coat film is preferably 0.5 to 4.0 micrometers ( ⁇ m), and more preferably 1.0 to 3.0 ⁇ m.
- the lower limit of this thickness is determined as described above because sufficient hardness cannot be obtained if the hard coat film is thinner than this lower limit.
- the upper limit of this thickness is determined as described above because there is a significantly increased possibility of problems related to physical properties, such as the occurrence of cracks and embrittlement, if the hard coat film is thicker than this upper limit.
- the optical multilayer film is formed by alternately laminating a low refractive index layer and a high refractive index layer using a vacuum deposition method, a sputtering method, or the like.
- the optical multilayer film include an antireflection film, a mirror, a half mirror, a neutral density (ND) filter, a bandpass filter, and the like.
- Each layer is made of an inorganic oxide, and examples of the inorganic oxide include silicon oxide and inorganic oxides having a higher refractive index than silicon oxide, such as titanium oxide, zirconium oxide, aluminum oxide, yttrium oxide, tantalum oxide, hafnium oxide, tin oxide, niobium oxide, cerium oxide, and indium oxide.
- Substoichiometric titanium oxide TiOx, where x ⁇ 2, and x is close to 2
- an ITO film may be used in at least one layer.
- the antifouling film is a film formed so as to have a surface peel strength of 0.10 newtons (N)/19 millimeters (mm).
- the peel strength refers to the average load per unit width required to peel an adhesive tape having a predetermined width from the antifouling film, as measured by peeling the adhesive tape at a rate of 300 mm/minute (min) in the direction of 180 degrees after sufficiently and firmly bonding the adhesive tape.
- a lower peel strength indicates a weaker adhesion force.
- the antifouling film is preferably made of a silane compound having a perfluoropolyether group, and preferably formed by coating using a dipping method and then curing.
- the silane compound is such a compound that a coating film when made only of the silane compound has a peel strength is 0.10 N/19 mm or less.
- Examples 1 to 5 were fabricated as examples belonging to the optical product of the present invention. Comparative Examples 1 to 6 that do not belong to the present invention were also fabricated for comparison with Examples 1 to 5. Measurements of various values, a dust adhesion test, and the like were then performed. Table 1 below shows the characteristics, test results, and so forth of Examples 1 to 5 and Comparative Examples 1 to 6.
- the lens bases of Examples 1 to 5 and Comparative Examples 1 to 6 are flat lenses made of plastic.
- An episulfide resin having a refractive index of 1.70 was used in Examples 2, 3 and Comparative Examples 2, 3, and a polyurethane resin having a refractive index of 1.60 was used in the other Examples and Comparative Examples.
- a primer layer was formed on the front surface of the lens base material.
- a primer solution was prepared by mixing 25 parts by weight of blocked polyisocyanate ("Coronate 2529" made by Nippon Polyurethane Industry Co., Ltd.), 18 parts by weight of polyester polyol ("Nippollan 100” made by Nippon Polyurethane Industry Co., Ltd.), and 100 parts by weight of ethyl cellosolve, adding 140 parts by weight of a composite sol of tin oxide and tungsten oxide (methanol-dispersed sol, mean particle system: 10 to 15 mm, ratio of tin oxide to tungsten oxide: 100 parts by weight to 40 parts by weight, solid content: 30%) and 0.15 parts by weight of a silicone surfactant to the mixture, and sufficiently stirring and mixing the resultant mixture.
- the lens base was coated with the primer solution by dipping at a lifting speed of 100 mm/min.
- the lens base thus coated with the primer solution was heated at 120 degrees Celsius for 30 minutes to cure the primer solution, thereby forming a primer film having a thickness of 1.0 ⁇ m.
- a hard coat film was formed in Examples 1 to 5 and Comparative Examples 1 to 6.
- a reaction container 206 grams (g) of ethanol, 300 g of a methanol-dispersed titania sol (made by JGC Catalysts and Chemicals Ltd., solid content: 30%), 60 g of ⁇ -glycidoxypropyltrimethoxysilane, 30 g of ⁇ -glycidoxypropylmethyldiethoxysilane, and 60 g of tetraethoxysilane were placed, and 0.01 N (normality) of a hydrochloric acid aqueous solution was dropped into the mixed solution. The resultant mixed solution was stirred to cause hydrolysis.
- a flow regulating agent ("L-7604" made by Dow Corning Toray Co., Ltd.) and 1.0 g of a catalyst were added, and the resultant mixed solution was stirred at room temperature for 3 hours to produce a hard coat solution.
- the lens base was coated with this hard coat solution by a dipping method, air-dried, and then heated at 110 degrees Celsius for 2 hours to cure the hard coat solution, thereby forming a hard coat film having a thickness of 2.0 ⁇ m.
- a five-layer multilayer film was formed in Examples 1, 5 and Comparative Example 1.
- the lens base having the hard coat film was placed in a vacuum vessel, and each layer was sequentially formed by a vacuum deposition method.
- odd layers were made of silicon dioxide, and even layers were made of zirconium oxide.
- Example 2 A seven-layer multilayer film was formed in Example 2 and Comparative Example 2. This multilayer film was formed in a manner similar to that of Examples 1, 5 and Comparative Example 1.
- Example 3 A seven-layer multilayer film was formed in Example 3 and Comparative Example 3.
- This multilayer film was formed in a manner similar to that of Examples 1, 5 and Comparative Example 1.
- odd layers were made of silicon dioxide, and even layers were made of titanium oxide.
- the optical thicknesses of the layers were 0.074 ⁇ , 0.061 ⁇ , 0.113 ⁇ , 0.180 ⁇ , 0.061 ⁇ , 0.168 ⁇ , and 0.273 ⁇ in that order from the side of the hard coat film.
- the pressure was adjusted by introducing oxygen gas so that the pressure became 0.010 pascals (Pa) at the time of titanium oxide deposition.
- Example 4 and Comparative Example 4 A seven-layer multilayer film was formed in Example 4 and Comparative Example 4.
- This multilayer film was formed in a manner similar to that of Example 3 and Comparative Example 3, and only the fourth layer from the side of the hard coat film was made of substoichiometric titanium oxide.
- substoichiometric titanium oxide was formed by vapor-depositing substoichiometric titanium oxide in a vacuum chamber having introduced therein oxygen gas for adjusting the degree of vacuum.
- the pressure was adjusted by introducing the oxygen gas so that the pressure became 0.0050 pascals (Pa) at the time of substoichiometric titanium oxide deposition.
- An antistatic property can be obtained by providing the substoichiometric titanium oxide layer exhibiting a conductive property.
- an ITO film, a combination of an ITO film and a substoichiometric titanium oxide film, or the like may be used as a conductive film.
- the value of "x" (the substoichiometric value) in TiOx can be finely adjusted by the amount of oxygen gas that is introduced into the vacuum chamber (a vacuum atmosphere) during deposition, and the pressure during deposition is determined by the amount of oxygen gas introduced. That is, the higher the pressure during deposition is, the more oxygen gas is introduced, whereby x approaches 2. The lower the pressure during deposition is, the less oxygen gas is introduced, whereby x becomes less than 2.
- the substoichiometric titanium oxide layer may be formed by vapor deposition while assisting the vapor deposition with oxygen ions and/or argon ions, or while performing a plasma treatment. In this case, a higher quality substoichiometric titanium oxide layer can be formed.
- the substoichiometric titanium oxide layer may be formed as a high refractive index layer at another position in the antireflection film (the optical multilayer film), or formed as an independent substoichiometric titanium oxide film.
- the Antistatic column shows the level of antistatic performance as determined based on the measurement of a charged electrostatic potential and adhestion of steel wool powder, where a circle indicates a high antistatic performance, and a cross indicates a relatively low antistatic performance.
- the Coloring column shows the level of the light transmitting property as determined based on the observation of appearance and calculation result of the light absorption ratio, where a circle indicates a high light transmitting property, and a cross indicates a relatively low light transmitting property.
- the above relationships (A) to (C) are determined based on the range in which both the antistatic property and the light transmitting property are obtained in Table 2.
- the relationship (A) is determined as described above because an optical thickness exceeding 0.500 ⁇ affects optical characteristics (the light transmitting property and the like) of the TiOx film.
- the relationship (C) may be optical thickness ⁇ (0.001exp(905.73p) - 0.050) ⁇ , or optical thickness ⁇ (0.001exp(905.73p) + 0.050) ⁇ , for example.
- Both the light transmitting property and the antistatic property can be obtained even when the pressure during deposition is 2.0 ⁇ 10 -3 Pa and the optical thickness is 0.050 ⁇ . In this case, however, light absorption was verified by an optical thickness meter during deposition of the TiOx layer, and thus performance as an optical member was degraded accordingly in this respect.
- Comparative Examples 5, 6 a single-layer organic antireflection film was formed by a spin coating method.
- a solution (“X-12-2510A” made by Shin-Etsu Chemical Co., Ltd.) mainly containing several kinds (compositions) of fluorine-containing organic silicon compounds and having a solid content of 3% was used as a coating solution for forming the organic antireflection film.
- the front surface of the hard coat film on the convex surface side of the lens base was subjected to a corona treatment for 20 seconds at a distance of 30 mm, and then coated with the coating solution by a spin coating treatment at a rotational speed of 1,300 rpm (rotations/min) for rotation time of 30 seconds, and subsequently heated at 100 degrees Celsius for 15 minutes to cure the coating solution.
- the concave surface side was treated in a manner similar to that of the convex surface side, and the coating solution was cured at 110 degrees Celsius for 1 hour, thereby forming an organic antireflection film.
- An antifouling film A described below was formed in Comparative Examples 1 to 5.
- An antifouling film B described below was formed in Examples 1 to 4 and Comparative Example 6.
- the antifouling film A was formed from an antifouling treatment solution having a solid content of 0.2%, which is produced by diluting a perfluoropolyether silane compound ("KY-8” made by Shin-Etsu Chemical Co., Ltd.) with a fluorine solvent ("Novec HFE-7200" made by Sumitomo 3M Limited).
- the antifouling film A was obtained by coating the lens base having the antireflection film formed thereon with this treatment solution by dipping for a dipping time of 30 seconds and at a lifting speed of 180 mm/min, and curing the treatment solution in a constant-temperature, constant-humidity environment having a temperature of 60 degrees Celsius and a humidity of 80%.
- the surface peel strength of the antifouling film A is 0.15 N/19 mm.
- the peel strength was obtained by first measuring loads per unit width (19 mm) required to peel an adhesive tape ("No. 31B" made by Nitto Denko Corporation, width: 19 mm) from the antifouling film A, when peeling the adhesive tape at a rate of 300 mm/min in the direction of 180 degrees after firmly bonding the adhesive tape at 20 g/cm 2 for 24 hours, and then calculating the average value of the measured loads.
- the antifouling film B was formed by performing a treatment in a manner similar to that of the antifouling film A using a perfluoropolyether silane compound ("X-71-166" made by Shin-Etsu Chemical Co., Ltd.).
- the surface peel strength of the antifouling film B was 0.06 N/19 mm.
- the surface peel strength was 0.09 N/19 mm.
- Measurement of the charged electrostatic potential was performed as follows.
- the charged electrostatic potential in kilovolts, kV
- the measurement was performed immediately after rubbing the convex surface of the lens with nonwoven fabric ("pure leaf” made by Ozu Corporation) 20 times back and forth for 10 seconds with a load of 1 kilogram.
- the measurement was performed with a static electricity measuring apparatus ("FMX-003" made by Simco Japan).
- Example 4 and Comparative Example 4 exhibit an antistatic property.
- the dust adhesion test was performed as follows. Each of the various optical products was sequentially placed, one at a time, into a polypropylene tray containing expanded polystyrene beads (substantially spherical with a diameter of approximately 1.6 mm). A lid was placed on the tray, and the tray was shook for 10 seconds (approximately 20 times back and forth). Thereafter, the optical product was gently removed from the tray, and examined for adhesion of the expanded polystyrene beads to the optical product.
- Table 1 a circle indicates almost no adhesion, a triangle indicates adhesion to a part of the surface of the optical product, and a cross indicates adhesion to almost the entire surface of the optical product.
- the ratio of the area occupied by the adhered expanded polystyrene beads to the area of the entire surface of the optical product was also calculated as an adhesion ratio of the expanded polystyrene beads.
- a dust adhesion test using steel wool was also performed. After similarly rubbing the surface of the optical product with nonwoven fabric, the optical product was moved toward finely cut pieces of steel wool to see if the steel wool was adhered to the convex surface of the lens.
- Table 1 a circle indicates no adhesion, a triangle indicates adhesion to a part of the surface of the optical product, and a cross indicates adhesion to almost the entire surface of the optical product.
- Example 4 which has a low charged electrostatic potential, a sufficiently low surface peel strength, and the substoichiometric titanium oxide layer exhibiting a conductive property, also has the highest antifouling property.
- the optical product merely having a low charged electrostatic potential does not exhibit a sufficient antifouling property against expanded polystyrene having static electricity.
- the optical product even if the charged electrostatic potential is somewhat high, the optical product merely adheres a small amount of steel wool as long as the absolute value of the charged electrostatic potential is 2.00 kV or less.
- the optical product due to its low peel strength and the like, the optical product can exhibit an antifouling property against expanded polystyrene having static electricity.
- the adhered steel wool and expanded polystyrene can be easily removed, and the optical product can exhibit a high antifouling property in this regard as well.
- a higher-level antifouling property can be obtained by making the peel strength equal to or less than 0.10 N/19 mm while making the absolute value of the charged electrostatic potential equal to or less than 2.00 kV, rather than by providing a high-performance antistatic film (conductive film) to make the charged electrostatic potential equal to zero.
- an antifouling property can be obtained against both the expanded polystyrene and the steel wool, even if the peel strength is adjusted to 0.09 N/19 mm (the absolute value of the charged electrostatic potential is 2.00 kV or less).
- antifouling films having different surface peel strengths from each other were produced by sequentially mixing the perfluoropolyether silane compounds of the antifouling films A and B at various solid content ratios such as 6/4, and the dust adhesion test was similarly performed.
- the test result showed that in the case where the absolute value of the charged electrostatic potential is 2.00 kV or less, a sufficient antifouling property can be obtained against both the expanded polystyrene and the steel wool if the peel strength is 0.10 N/19 mm.
- a high antifouling performance can be achieved by introducing the antifouling film having (1) the charged electrostatic potential whose absolute value is equal to or less than 2.00 kV, and (2) the surface peel strength of 0.10 N/19 mm or less.
- an optical product having strength, optical characteristics such as antireflection, and a high-level antifouling property can be configured by placing the hard coat film and the optical multilayer film between the base and the antifouling film.
- the optical product can be provided with a higher-level antifouling performance by placing the conductive film between the base and the antifouling film.
- Forming the conductive film as at least one layer of the optical multilayer film can further provide the optical property with strength and optical characteristics such as antireflection, whereby an efficient film configuration can be implemented in which the optical multilayer film has a function of the conductive film as well.
- forming the substoichiometric titanium oxide film as the conductive film can facilitate formation of the conductive film, and the conductive film having a sufficient antistatic property as well as a high light transmitting property can be formed by forming the substoichiometric titanium oxide film under the above conditions (A) to (C) or the like.
- forming the antifouling film from a silane compound having a perfluoropolyether group can facilitate formation of the antifouling film satisfying (1) and (2) described above, and can facilitate adjustment of the peel strength.
- the optical multilayer film is a multilayer film of inorganic oxides, formation of the optical multilayer film can be facilitated, and an optical product having both an optical performance and antifouling performance can be provided by achieving satisfactory matching with the antifouling film.
- the hard coat film is made of an organosiloxane resin, inorganic oxide fine particles, and the like, an optical product having high strength can be provided by achieving satisfactory matching with the optical multilayer film.
- a spectacle plastic lens exhibiting a high antifouling performance while having an antireflection performance can be provided by using an antireflection film as the optical multilayer film and using a base of the spectacle plastic lens as the base of the optical product.
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Abstract
Description
- The present invention relates to an optical product such as a camera lens, and to a spectacle plastic lens.
- Optical products made of plastic are likely to adhere grime such as dirt or dust due to static electricity, and a spectacle lens in particular must be wiped frequently. If the lens is wiped or the like with dust thereon, the dust may scratch the lens surface. In other optical products as well, dust adhered thereto may affect output image and the like.
- Attempts have been made in the past to suppress the adhesion of dust by preventing electrostatic charging of the optical product. A known method for obtaining an antistatic property is to provide a conductive coating layer as described in Patent Documents 1 and 2 below. In Patent Document 1, a hard coat layer formed on a base contains conductive tin oxide. Patent Document 2 mentions an antireflection film including a transparent conductive film (an indium tin oxide film or an ITO film) formed by adding 5 to 10 weight percent (wt%) of tin oxide to indium oxide.
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- Patent Document 1: Japanese Patent Application Publication No.
JP-A-H05-104673 - Patent Document 2: Japanese Patent Application Publication No.
JP-A-H01-309003 - In such an optical product having a conductive coating layer, the surface potential remains at zero even when the optical product is wiped or the like. The optical product is less likely to attract dust compared to an optical product that does not have such a coating layer and is thus electrostatically charged. However, even if the surface potential is zero, electrostatically charged dust may be adhered to the optical product due to the potential difference between the surface potential and the electrostatically charged dust.
- Moreover, although providing the conductive coating layer can make the optical product less likely to adhere dust, the coating layer does not work for dust that has already been adhered to the optical product, and the coating layer does not facilitate the removal of such adhered dust.
- It is an object of the invention according to claim 1 to provide an optical product and a spectacle plastic lens, which are less likely to adhere dust having static electricity, and from which adhered dust can be easily removed.
- In order to achieve the above object, the invention according to claim 1 is related to an optical product characterized in that an antifouling film is formed on a base of the optical product to satisfy the following conditions: (1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and (2) a surface peel strength is 0.10 N/19 mm or less.
- In order to achieve an object to provide an optical product having strength, optical characteristics such as antireflection, and a high-level antifouling property in addition to the above object, the invention according to claim 2 is characterized in that, in the above invention, a hard coat film and an optical multilayer film are sequentially formed on the base of the optical product, and the antifouling film is formed on the optical multilayer film.
- In order to achieve an object to provide a higher-level antifouling performance in addition to the above object, the invention according to claim 3 is characterized in that, in the above invention, a conductive film is placed between the base of the optical product and the antifouling film.
- In order to achieve an object to provide an optical product capable of facilitating formation of the antifouling film and capable of easily adjusting the peel strength in addition to the above object, the invention according to claim 4 is characterized in that, in the above invention, the antifouling film is formed by performing coating with a silane compound having a perfluoropolyether group, wherein a coating film when made only of the silane compound has a peel strength of 0.10 N/19 mm or less.
- In order to achieve an object to facilitate formation of the optical multilayer film while considering formation of the antifouling film in addition to the above object, the invention according to claim 5 is characterized in that, in the above invention, the optical multilayer film is a multilayer film of an inorganic oxide.
- In order to achieve an object to provide an optical product having high strength by achieving satisfactory matching with the optical multilayer film in addition to the above object, the invention according to claim 6 is characterized in that, in the above invention, the hard coat film contains an organosiloxane resin and inorganic oxide fine particles.
- In order to achieve an object to provide a spectacle plastic lens that belongs to such an optical product having a high optical performance and a high antifouling performance as described above, the invention according to claim 7 is related to a spectacle plastic lens characterized in that, in the above invention, the base of the optical product is a base of the spectacle plastic lens, and the optical multilayer film is an antireflection film.
- According to the present invention, an optical product having a high antifouling performance can be provided by introducing an antifouling film that satisfies the following conditions: (1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and (2) a surface peel strength is 0.10 N/19 mm or less.
- An embodiment of the present invention will be described below. Note that the present invention is not limited to the following embodiment.
- An optical lens as an example of an optical product of the present invention has a hard coat film, an optical multilayer film, and an antifouling film on a front surface of a lens base, in that order from the lens base. Note that the film configuration may be modified. For example, a primer layer may be formed between the front surface of the lens base and the hard coat film, or an intermediate layer may be provided between the front surface of the lens base and the hard coat film, between the hard coat layer and the optical multilayer film, between the optical multilayer film and the antifouling film. Alternatively, the hard coat film, the optical multilayer film, and the like may be formed on a back surface of the lens base or on both the front and back surfaces of the lens base.
- Examples of a material (a base material) of the lens base include a polyurethane resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyethersulfone resin, a poly-4-methylpentene-1 resin, and a diethylene glycol bisallyl carbonate resin. A preferred example of the material of the lens base having a high refractive index is a polyurethane resin that is obtained by addition-polymerizing a polyisocyanate compound and a polythiol and/or a sulfur-containing polyol. Another preferred example of the material of the lens base having a higher refractive index is an episulfide resin that is obtained by addition-polymerizing an episulfide group and a polythiol and/or a sulfur-containing polyol.
- The hard coat film is formed by uniformly coating the lens base with a hard coat solution. For example, an organosiloxane resin containing inorganic oxide fine particles is used as a material of the hard coat film, and in this case, the hard coat solution is prepared by dispersing (mixing) mainly an organosiloxane resin and an inorganic oxide fine particle sol in water or an alcohol solvent.
- A preferred example of the organosiloxane resin is one obtained by hydrolyzing and condensing an alkoxysilane. Specific examples of the alkoxysilane include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, methyltrimethoxysilane, and ethyl silicate. Hydrolyzed condensations of these alkoxysilanes are produced by hydrolyzing the alkoxysilane compounds or combinations thereof using an acidic aqueous solution such as hydrochloric acid.
- Specific examples of the inorganic oxide fine particles include one of sols of zinc oxide, silicon dioxide, aluminum oxide, titanium oxide, zirconium oxide, tin oxide, beryllium oxide, antimony oxide, tungsten oxide, and cerium oxide, or alloys of two or more of the sols. In order to ensure transparency of the hard coat film, the particle size of the inorganic oxide fine particles is preferably 1 to 100 nanometers (nm), and more preferably 1 to 50 nm. Moreover, the amount of inorganic oxide fine particles is preferably 40 to 60 wt% based on the hard coat components in order to ensure appropriate levels of hardness and toughness of the hard coat film.
- In addition, an acetylacetone metal salt, an ethylenediaminetetraacetic acid metal salt, or the like may be added as a curing catalyst to the hard coat solution, and a surfactant, a colorant, a solvent, or the like may be further added as necessary for adjustment.
- The thickness of the hard coat film is preferably 0.5 to 4.0 micrometers (µm), and more preferably 1.0 to 3.0 µm. The lower limit of this thickness is determined as described above because sufficient hardness cannot be obtained if the hard coat film is thinner than this lower limit. On the other hand, the upper limit of this thickness is determined as described above because there is a significantly increased possibility of problems related to physical properties, such as the occurrence of cracks and embrittlement, if the hard coat film is thicker than this upper limit.
- The optical multilayer film is formed by alternately laminating a low refractive index layer and a high refractive index layer using a vacuum deposition method, a sputtering method, or the like. Examples of the optical multilayer film include an antireflection film, a mirror, a half mirror, a neutral density (ND) filter, a bandpass filter, and the like. Each layer is made of an inorganic oxide, and examples of the inorganic oxide include silicon oxide and inorganic oxides having a higher refractive index than silicon oxide, such as titanium oxide, zirconium oxide, aluminum oxide, yttrium oxide, tantalum oxide, hafnium oxide, tin oxide, niobium oxide, cerium oxide, and indium oxide. Substoichiometric titanium oxide (TiOx, where x < 2, and x is close to 2) may be used, and an ITO film may be used in at least one layer.
- The antifouling film is a film formed so as to have a surface peel strength of 0.10 newtons (N)/19 millimeters (mm). The peel strength refers to the average load per unit width required to peel an adhesive tape having a predetermined width from the antifouling film, as measured by peeling the adhesive tape at a rate of 300 mm/minute (min) in the direction of 180 degrees after sufficiently and firmly bonding the adhesive tape. A lower peel strength indicates a weaker adhesion force.
- The antifouling film is preferably made of a silane compound having a perfluoropolyether group, and preferably formed by coating using a dipping method and then curing. The silane compound is such a compound that a coating film when made only of the silane compound has a peel strength is 0.10 N/19 mm or less.
- As described below, Examples 1 to 5 were fabricated as examples belonging to the optical product of the present invention. Comparative Examples 1 to 6 that do not belong to the present invention were also fabricated for comparison with Examples 1 to 5. Measurements of various values, a dust adhesion test, and the like were then performed. Table 1 below shows the characteristics, test results, and so forth of Examples 1 to 5 and Comparative Examples 1 to 6.
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[Table 1] Examples Comparative Example 1 Example 1 Comparative Example 2 Example 2 Comparative Example 3 Example 3 Comparative Example 4 Example 4 Example 5 Comparative Example 5 Comparative Example 6 Base Material Refractive Index 1.60 1.60 1.70 1.70 1.70 1.70 1.60 1.60 1.60 1.60 1.60 Antireflection Film Inorganic 5-layer (SiO2/ZrO2) Inorganic 7-layer (SiO2/ZrO2) Inorganic 7-layer (SiO2/TiO2) Inorganic 7-layer (SiO2/TiO2) Insert substoichiometric Titanium Oxide Film Inorganic 5-layer Organic AR Organic AR Antifouling Film A B A B A B A B A/B = 7/3 A B Peel Strength [N/19 mm] 0.15 0.06 0.15 0.06 0.15 0.06 0.15 0.06 0.09 0.15 0.06 Charged electrostatic Potential [kV] Immediately After Rubbing -4.00 -1.50 -2.50 -1.80 -2.30 -1.20 0.00 0.00 -1.43 -6.50 -6.40 Dust Adhesion Test Expanded Polystyrene Test × ○ × ○ × ○ × ○ ○ × △ Adhesion Ratio of Expanded Polystyrene 100% 5% 100% 5% 100% 5% 90% 5% 5% 100% 30% Steel Wool Test × △ × △ × △ ○ ○ △ × × Overall Evaluation × ○-△ × ○-△ × ○-△ △ ○ ○-△ × × - The lens bases of Examples 1 to 5 and Comparative Examples 1 to 6 are flat lenses made of plastic. An episulfide resin having a refractive index of 1.70 was used in Examples 2, 3 and Comparative Examples 2, 3, and a polyurethane resin having a refractive index of 1.60 was used in the other Examples and Comparative Examples.
- In Examples 2, 3 and Comparative Examples 2, 3, a primer layer was formed on the front surface of the lens base material. A primer solution was prepared by mixing 25 parts by weight of blocked polyisocyanate ("Coronate 2529" made by Nippon Polyurethane Industry Co., Ltd.), 18 parts by weight of polyester polyol ("Nippollan 100" made by Nippon Polyurethane Industry Co., Ltd.), and 100 parts by weight of ethyl cellosolve, adding 140 parts by weight of a composite sol of tin oxide and tungsten oxide (methanol-dispersed sol, mean particle system: 10 to 15 mm, ratio of tin oxide to tungsten oxide: 100 parts by weight to 40 parts by weight, solid content: 30%) and 0.15 parts by weight of a silicone surfactant to the mixture, and sufficiently stirring and mixing the resultant mixture. Then, the lens base was coated with the primer solution by dipping at a lifting speed of 100 mm/min. The lens base thus coated with the primer solution was heated at 120 degrees Celsius for 30 minutes to cure the primer solution, thereby forming a primer film having a thickness of 1.0 µm.
- Next, a hard coat film was formed in Examples 1 to 5 and Comparative Examples 1 to 6. In a reaction container, 206 grams (g) of ethanol, 300 g of a methanol-dispersed titania sol (made by JGC Catalysts and Chemicals Ltd., solid content: 30%), 60 g of γ-glycidoxypropyltrimethoxysilane, 30 g of γ-glycidoxypropylmethyldiethoxysilane, and 60 g of tetraethoxysilane were placed, and 0.01 N (normality) of a hydrochloric acid aqueous solution was dropped into the mixed solution. The resultant mixed solution was stirred to cause hydrolysis. Then, 0.5 g of a flow regulating agent ("L-7604" made by Dow Corning Toray Co., Ltd.) and 1.0 g of a catalyst were added, and the resultant mixed solution was stirred at room temperature for 3 hours to produce a hard coat solution. The lens base was coated with this hard coat solution by a dipping method, air-dried, and then heated at 110 degrees Celsius for 2 hours to cure the hard coat solution, thereby forming a hard coat film having a thickness of 2.0 µm.
- Various antireflection films were subsequently formed. A five-layer multilayer film was formed in Examples 1, 5 and Comparative Example 1. The lens base having the hard coat film was placed in a vacuum vessel, and each layer was sequentially formed by a vacuum deposition method. Regarding the materials of the layers, odd layers were made of silicon dioxide, and even layers were made of zirconium oxide. The optical thicknesses of the layers were 0.214λ, 0.080λ, 0.071λ, 0.389λ, and 0.236λ in that order from the side of the hard coat film (the lens base material), where λ is a wavelength and λ = 500 nm.
- A seven-layer multilayer film was formed in Example 2 and Comparative Example 2. This multilayer film was formed in a manner similar to that of Examples 1, 5 and Comparative Example 1. The optical thicknesses of the layers were 0.078λ, 0.056λ, 0.487λ, 0.112λ, 0.059λ, 0.263λ, and 0.249λ in that order from the side of the hard coat film, where the wavelength was set to λ = 500 nm.
- A seven-layer multilayer film was formed in Example 3 and Comparative Example 3. This multilayer film was formed in a manner similar to that of Examples 1, 5 and Comparative Example 1. Regarding the materials of the layers, odd layers were made of silicon dioxide, and even layers were made of titanium oxide. The optical thicknesses of the layers were 0.074λ, 0.061λ, 0.113λ, 0.180λ, 0.061λ, 0.168λ, and 0.273λ in that order from the side of the hard coat film. The pressure was adjusted by introducing oxygen gas so that the pressure became 0.010 pascals (Pa) at the time of titanium oxide deposition. The wavelength was set to λ = 500 nm.
- A seven-layer multilayer film was formed in Example 4 and Comparative Example 4. This multilayer film was formed in a manner similar to that of Example 3 and Comparative Example 3, and only the fourth layer from the side of the hard coat film was made of substoichiometric titanium oxide. The optical thicknesses of the layers were 0.074λ, 0.061λ, 0.113λ, 0.185λ, 0.061λ, 0.168λ, and 0.273λ in that order from the side of the hard coat film (where the wavelength was set to λ = 500 nm). In this case, substoichiometric titanium oxide was formed by vapor-depositing substoichiometric titanium oxide in a vacuum chamber having introduced therein oxygen gas for adjusting the degree of vacuum. The pressure was adjusted by introducing the oxygen gas so that the pressure became 0.0050 pascals (Pa) at the time of substoichiometric titanium oxide deposition. An antistatic property can be obtained by providing the substoichiometric titanium oxide layer exhibiting a conductive property. Note that an ITO film, a combination of an ITO film and a substoichiometric titanium oxide film, or the like may be used as a conductive film.
- Although trititanium pentoxide ("OS-50" made by Canon Optron, Inc.) was used as a vapor deposition material of substoichiometric titanium oxide, and substoichiometric titanium oxide was vapor-deposited while being produced by the following reaction, any titanium oxide can be used.
Ti3O5 + δO2 → 3TiOx
- In this example, the value of "x" (the substoichiometric value) in TiOx can be finely adjusted by the amount of oxygen gas that is introduced into the vacuum chamber (a vacuum atmosphere) during deposition, and the pressure during deposition is determined by the amount of oxygen gas introduced. That is, the higher the pressure during deposition is, the more oxygen gas is introduced, whereby x approaches 2. The lower the pressure during deposition is, the less oxygen gas is introduced, whereby x becomes less than 2.
- Note that a pressure "p" (Pa) during deposition in the vacuum chamber and the optical thickness (refractive index: 2.50, wavelength λ = 500 nm) of the substoichiometric titanium oxide layer can be made to have the following relationships: (A) p ≥ 0.005, (B) optical thickness ≤ 0.500λ, and (C) optical thickness ≥ (0.001exp(905.73p) - 0.050)λ, where "exp" represents an exponential function having a base "e" of a natural logarithm as its base. Thus, a sufficient antistatic property can be obtained while providing a high light transmitting property (non-coloring property), as shown in Table 2 below. Alternatively, the substoichiometric titanium oxide layer may be formed by vapor deposition while assisting the vapor deposition with oxygen ions and/or argon ions, or while performing a plasma treatment. In this case, a higher quality substoichiometric titanium oxide layer can be formed. Moreover, the substoichiometric titanium oxide layer may be formed as a high refractive index layer at another position in the antireflection film (the optical multilayer film), or formed as an independent substoichiometric titanium oxide film.
-
[Table 2] Film Forming Pressure [Pa] 7.5E-03 6.7E-03 6.0E-03 5.5E-03 5.0E-03 4.0E-03 3.0E-03 2.0E-03 Antistatic Coloring Antistatic Coloring Antistatic Coloring Antistatic Coloring Antistatic Coloring Antistatic Coloring Antistatic Coloring Antistatic Coloring 0.500λ × ○ ○ ○ ○ ○ - - ○ ○ - - - - ○ × 0.450λ - - ○ ○ ○ ○ - - - - - - - - - - 0.400λ - - × ○ ○ ○ - - ○ ○ - - - - - - 0.350λ - - × ○ - - - - - - - - - - - - Optical Thickness (λ-500 nm) 0.300λ - - × ○ ○ ○ - - ○ ○ - - - - - - 0.250λ - - × ○ - - - - - - - - - - - - 0.200λ - - × ○ ○ ○ ○ ○ ○ ○ - - - - - - 0.150λ - - × ○ × ○ ○ ○ ○ ○ - - - - - - 0.100λ - - × ○ × ○ - - ○ ○ - - - - - - 0.050λ × ○ × ○ - - - - × ○ × ○ × ○ ○ ○ - Regarding the samples with a symbol other than "-" indicated in the boxes at the intersections of Optical Thickness and Pressure During Deposition in Table 2, a single-layer TiOx film was formed, with the respective optical thicknesses and the respective pressures during deposition, on each of the front surfaces of plastic bases having the hard coat film thereon and a refractive index of 1.60, and the front surfaces of glass bases. In this case, the TiOx films in the former plastic bases were used to check for antistatic performance and coloring in appearance. The TiOx films in the latter glass bases were used to calculate the light absorption ratio.
- In Table 2, the Antistatic column shows the level of antistatic performance as determined based on the measurement of a charged electrostatic potential and adhestion of steel wool powder, where a circle indicates a high antistatic performance, and a cross indicates a relatively low antistatic performance. The Coloring column shows the level of the light transmitting property as determined based on the observation of appearance and calculation result of the light absorption ratio, where a circle indicates a high light transmitting property, and a cross indicates a relatively low light transmitting property.
- The above relationships (A) to (C) are determined based on the range in which both the antistatic property and the light transmitting property are obtained in Table 2. In particular, the relationship (A) is determined as described above because an optical thickness exceeding 0.500λ affects optical characteristics (the light transmitting property and the like) of the TiOx film. The relationship (C) is determined as described above by fitting an exponential function {optical thickness = (a.exp(b.p))λ} having a base "e" of a natural logarithm as its base, in a state with a minimum error (by the least squares method), for the lower limit of the range of the optical thickness in which both the antistatic property and the light transmitting property are obtained (in consideration of an error (±0.05λ) caused by a change in the refractive index or the like due to an error in the degree of vacuum). If the relationships (A) to (C) were satisfied, both the antistatic property and the light transmitting property were obtained even when the TiOx film was formed in at least one layer of the optical multilayer film. Note that, in consideration of an error or the like, the relationship (C) may be optical thickness ≥ (0.001exp(905.73p) - 0.050)λ, or optical thickness ≥ (0.001exp(905.73p) + 0.050)λ, for example. Both the light transmitting property and the antistatic property can be obtained even when the pressure during deposition is 2.0 × 10-3 Pa and the optical thickness is 0.050λ. In this case, however, light absorption was verified by an optical thickness meter during deposition of the TiOx layer, and thus performance as an optical member was degraded accordingly in this respect.
- On the other hand, in Comparative Examples 5, 6, a single-layer organic antireflection film was formed by a spin coating method. A solution ("X-12-2510A" made by Shin-Etsu Chemical Co., Ltd.) mainly containing several kinds (compositions) of fluorine-containing organic silicon compounds and having a solid content of 3% was used as a coating solution for forming the organic antireflection film. The front surface of the hard coat film on the convex surface side of the lens base was subjected to a corona treatment for 20 seconds at a distance of 30 mm, and then coated with the coating solution by a spin coating treatment at a rotational speed of 1,300 rpm (rotations/min) for rotation time of 30 seconds, and subsequently heated at 100 degrees Celsius for 15 minutes to cure the coating solution. After heat-curing, the concave surface side was treated in a manner similar to that of the convex surface side, and the coating solution was cured at 110 degrees Celsius for 1 hour, thereby forming an organic antireflection film.
- Three kinds of antifouling films were formed next. An antifouling film A described below was formed in Comparative Examples 1 to 5. An antifouling film B described below was formed in Examples 1 to 4 and Comparative Example 6. An antifouling film having the properties of both the antifouling films A and B, described below, was formed in Example 5.
- The antifouling film A was formed from an antifouling treatment solution having a solid content of 0.2%, which is produced by diluting a perfluoropolyether silane compound ("KY-8" made by Shin-Etsu Chemical Co., Ltd.) with a fluorine solvent ("Novec HFE-7200" made by Sumitomo 3M Limited). The antifouling film A was obtained by coating the lens base having the antireflection film formed thereon with this treatment solution by dipping for a dipping time of 30 seconds and at a lifting speed of 180 mm/min, and curing the treatment solution in a constant-temperature, constant-humidity environment having a temperature of 60 degrees Celsius and a humidity of 80%. The surface peel strength of the antifouling film A is 0.15 N/19 mm. The peel strength was obtained by first measuring loads per unit width (19 mm) required to peel an adhesive tape ("No. 31B" made by Nitto Denko Corporation, width: 19 mm) from the antifouling film A, when peeling the adhesive tape at a rate of 300 mm/min in the direction of 180 degrees after firmly bonding the adhesive tape at 20 g/cm2 for 24 hours, and then calculating the average value of the measured loads.
- The antifouling film B was formed by performing a treatment in a manner similar to that of the antifouling film A using a perfluoropolyether silane compound ("X-71-166" made by Shin-Etsu Chemical Co., Ltd.). The surface peel strength of the antifouling film B was 0.06 N/19 mm.
- In Example 5, a treatment solution having a solid content of 0.2% was obtained by sequentially mixing the perfluoropolyether silane compounds of the antifouling films A and B at a solid content ratio of 7 to 3 (AB = 7/3). Then, the antifouling film was formed by performing a treatment in a manner similar to that of the antifouling film A. The surface peel strength was 0.09 N/19 mm.
- Measurement of the charged electrostatic potential and the dust adhesion test were performed on various optical products thus obtained.
- Measurement of the charged electrostatic potential was performed as follows. The charged electrostatic potential (in kilovolts, kV) was measured immediately after rubbing the convex surface of the lens with nonwoven fabric ("pure leaf" made by Ozu Corporation) 20 times back and forth for 10 seconds with a load of 1 kilogram. The measurement was performed with a static electricity measuring apparatus ("FMX-003" made by Simco Japan).
- The absolute value of the charged electrostatic potential was the same in Examples 1 to 4 and Comparative Examples 1 to 4, or slightly lower in Examples 1 to 4. In Example 4 and Comparative Example 4, the charged electrostatic potential was zero due to the formation of the substoichiometric titanium oxide layer exhibiting a conductive property, and thus Example 4 and Comparative Example 4 exhibit an antistatic property.
- The dust adhesion test was performed as follows. Each of the various optical products was sequentially placed, one at a time, into a polypropylene tray containing expanded polystyrene beads (substantially spherical with a diameter of approximately 1.6 mm). A lid was placed on the tray, and the tray was shook for 10 seconds (approximately 20 times back and forth). Thereafter, the optical product was gently removed from the tray, and examined for adhesion of the expanded polystyrene beads to the optical product. In Table 1, a circle indicates almost no adhesion, a triangle indicates adhesion to a part of the surface of the optical product, and a cross indicates adhesion to almost the entire surface of the optical product. The ratio of the area occupied by the adhered expanded polystyrene beads to the area of the entire surface of the optical product was also calculated as an adhesion ratio of the expanded polystyrene beads.
- A dust adhesion test using steel wool was also performed. After similarly rubbing the surface of the optical product with nonwoven fabric, the optical product was moved toward finely cut pieces of steel wool to see if the steel wool was adhered to the convex surface of the lens. In Table 1, a circle indicates no adhesion, a triangle indicates adhesion to a part of the surface of the optical product, and a cross indicates adhesion to almost the entire surface of the optical product.
- An overall evaluation of the various optical products was made based on the dust adhesion test and so forth. In Table 1, a circle indicates almost no adhesion of the expanded polystyrene beads and the steel wool, and thus indicates that a satisfactory antidust property (antifouling property) was obtained. A circle-triangle indicates that either the expanded polystyrene beads or the steel wool was somewhat adhered, and thus indicates that a somewhat satisfactory antifouling property was obtained. A triangle indicates that adhesion of either the expanded polystyrene beads or the steel wool was recognized, and thus indicates that the antifouling property was relatively low. A cross indicates that adhesion of both the expanded polystyrene beads and the steel wool was recognized, and thus indicates that the antifouling property was low.
- Note that the various optical products were also examined for the light transmitting property. For each optical product, reflectance in the visible region was within several percent or less. All of the optical products were transparent, and there was no problem with the light transmitting property.
- The above description shows that Example 4, which has a low charged electrostatic potential, a sufficiently low surface peel strength, and the substoichiometric titanium oxide layer exhibiting a conductive property, also has the highest antifouling property. As can be seen from Comparative Example 4, the optical product merely having a low charged electrostatic potential does not exhibit a sufficient antifouling property against expanded polystyrene having static electricity.
- As in Examples 1 to 3, even if the charged electrostatic potential is somewhat high, the optical product merely adheres a small amount of steel wool as long as the absolute value of the charged electrostatic potential is 2.00 kV or less. Thus, due to its low peel strength and the like, the optical product can exhibit an antifouling property against expanded polystyrene having static electricity. Moreover, due to the low peel strength and the like, the adhered steel wool and expanded polystyrene can be easily removed, and the optical product can exhibit a high antifouling property in this regard as well. That is, a higher-level antifouling property can be obtained by making the peel strength equal to or less than 0.10 N/19 mm while making the absolute value of the charged electrostatic potential equal to or less than 2.00 kV, rather than by providing a high-performance antistatic film (conductive film) to make the charged electrostatic potential equal to zero.
- On the other hand, if the absolute value of the charged electrostatic potential is larger than 2.00 kV as in Comparative Example 6, even if the peel strength is low, the optical product cannot exhibit an antifouling property against steel wool and cannot exhibit a high antifouling property against expanded polystyrene. Note that the adhered steel wool and expanded polystyrene are adhered by the charged electrostatic potential and the like, thus making them difficult to remove.
- Moreover, as in Example 5, an antifouling property can be obtained against both the expanded polystyrene and the steel wool, even if the peel strength is adjusted to 0.09 N/19 mm (the absolute value of the charged electrostatic potential is 2.00 kV or less). Note that antifouling films having different surface peel strengths from each other were produced by sequentially mixing the perfluoropolyether silane compounds of the antifouling films A and B at various solid content ratios such as 6/4, and the dust adhesion test was similarly performed. The test result showed that in the case where the absolute value of the charged electrostatic potential is 2.00 kV or less, a sufficient antifouling property can be obtained against both the expanded polystyrene and the steel wool if the peel strength is 0.10 N/19 mm.
- That is, a high antifouling performance can be achieved by introducing the antifouling film having (1) the charged electrostatic potential whose absolute value is equal to or less than 2.00 kV, and (2) the surface peel strength of 0.10 N/19 mm or less.
- Moreover, an optical product having strength, optical characteristics such as antireflection, and a high-level antifouling property can be configured by placing the hard coat film and the optical multilayer film between the base and the antifouling film.
- The optical product can be provided with a higher-level antifouling performance by placing the conductive film between the base and the antifouling film. Forming the conductive film as at least one layer of the optical multilayer film can further provide the optical property with strength and optical characteristics such as antireflection, whereby an efficient film configuration can be implemented in which the optical multilayer film has a function of the conductive film as well. Moreover, forming the substoichiometric titanium oxide film as the conductive film can facilitate formation of the conductive film, and the conductive film having a sufficient antistatic property as well as a high light transmitting property can be formed by forming the substoichiometric titanium oxide film under the above conditions (A) to (C) or the like.
- Furthermore, forming the antifouling film from a silane compound having a perfluoropolyether group can facilitate formation of the antifouling film satisfying (1) and (2) described above, and can facilitate adjustment of the peel strength.
- In addition, since the optical multilayer film is a multilayer film of inorganic oxides, formation of the optical multilayer film can be facilitated, and an optical product having both an optical performance and antifouling performance can be provided by achieving satisfactory matching with the antifouling film.
- Furthermore, since the hard coat film is made of an organosiloxane resin, inorganic oxide fine particles, and the like, an optical product having high strength can be provided by achieving satisfactory matching with the optical multilayer film.
- Moreover, a spectacle plastic lens exhibiting a high antifouling performance while having an antireflection performance can be provided by using an antireflection film as the optical multilayer film and using a base of the spectacle plastic lens as the base of the optical product.
Claims (7)
- An optical product, characterized in that
an antifouling film is formed on a base of the optical product to satisfy the following conditions:(1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and(2) a surface peel strength is 0.10 N/19 mm or less. - The optical product according to claim 1, characterized in that
a hard coat film and an optical multilayer film are sequentially formed on the base of the optical product, and
the antifouling film is formed on the optical multilayer film. - The optical product according to claim 1 or 2, characterized in that
a conductive film is placed between the base of the optical product and the antifouling film. - The optical product according to any one of claims 1 to 3, characterized in that
the antifouling film is formed by performing coating with a silane compound having a perfluoropolyether group, wherein a coating film when made only of the silane compound has a peel strength of 0.10 N/19 mm or less. - The optical product according to any one of claims 2 to 4, characterized in that
the optical multilayer film is a multilayer film of an inorganic oxide. - The optical product according to any one of claims 2 to 5, characterized in that
the hard coat film contains an organosiloxane resin and inorganic oxide fine particles. - A spectacle plastic lens, characterized in that
in the optical product according to any one of claims 2 to 6, the base of the optical product is a base of the spectacle plastic lens, and the optical multilayer film is an antireflection film.
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CN102460224A (en) | 2012-05-16 |
JP2011002515A (en) | 2011-01-06 |
ES2446360T3 (en) | 2014-03-07 |
JP5927457B2 (en) | 2016-06-01 |
US8746880B2 (en) | 2014-06-10 |
KR20120034655A (en) | 2012-04-12 |
CN102460224B (en) | 2014-03-26 |
KR101670005B1 (en) | 2016-10-27 |
EP2431772A4 (en) | 2012-10-03 |
WO2010147048A1 (en) | 2010-12-23 |
EP2431772B1 (en) | 2013-11-13 |
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